NDLI: Hydrothermal Synthesis and Up-Conversion Luminescence of Yb$^{3+}$/Ho$^{3+}$ Co-doped Y$_{6}$WO$

Content Provider	Springer Nature Link
Author	Rao, Weifeng Zhu, Qiansheng Ren, Qiang Wu, Chenchen Miao, Juhong
Copyright Year	2017
Abstract	Yb$^{3+}$/Ho$^{3+}$ co-doped Y$_{6}$WO$_{12}$ nanocrystals with different concentrations of Ho$^{3+}$ ions have been synthesized through a facile hydrothermal method followed by a subsequent heat treatment. The nanostructures, morphologies, and up-conversion luminescent properties of the as-prepared Y$_{6}$WO$_{12}$:Yb$^{3+}$/Ho$^{3+}$ nanocrystals were investigated by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence spectra. XRD results indicate that all the diffraction peaks of the samples match well with the cubic phase of Y$_{6}$WO$_{12}$. SEM images demonstrate that the samples consist of spherical-like nanoparticles ranging in size from about 30 nm to 50 nm, which increases slightly with the increase of sintering temperature. Under the excitation of a 980 nm diode laser, the as-prepared nanocrystals show bight red and green luminescence, which is attributed to the transition of $^{5}$F$_{5}$ → $^{5}$I$_{8}$ and $^{5}$F$_{4}$, $^{5}$S$_{2}$ → $^{5}$I$_{8}$ of Ho$^{3+}$, respectively. With the elevation of the heat treatment temperature from 700°C to 900°C, the up-conversion emission intensity goes up significantly. Additionally, the decay lifetimes data follow a bi-exponential nature. Both the emission intensity (red and green) and their corresponding decay lifetimes increase with increasing Ho$^{3+}$ concentration, maximizing at 1.0 mol.%, and then decrease, which is mainly attributed to the concentration quenching effect.
Starting Page	5303
Ending Page	5307
Page Count	5
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	46
Issue Number	8
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2017-05-08
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrothermal up-conversion luminescence Y$_{6}$WO$_{12}$ Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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